JPH077762A - Radio telephony - Google Patents

Abstract

PURPOSE: To use this device at all positions by allowing a speaker to radiate a sound from a narrow width side toward a listener, and arranging a microphone adjacently to a narrow width side at the opposite side to a speaker. CONSTITUTION: A speaker 5 is integrated so that a sound can be radiated from a narrow width side toward the speaker/listener of a sun visor 6. In this case, a flat speaker, for example, a piezoelectric speaker is used. The sun visor 6 is connected through a transmitting device 7 with a fixing member 8. The fixing member 8 supports microphones 2, 3, and 4, and this is constituted as a rod. The sun visor 6 is provided at the upper part of a front glass in an automobile chamber. The device 7 connects the sun visor 6, that is, the speaker 5 with the microphones 2, 3, and 4. The revolving motion of the sun visor 6 can be converted into the rotating motion of the microphones 2, 3, and 4 by the transmitting device. Thus, a radio telephone can be used at all the positions of the sun visor.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a radio telephone having at least one speaker and at least one microphone incorporated in a sun visor device.

[0002]

2. Description of the Related Art German Patent Publication No. 3009483 discloses a radiotelephone having devices that operate separately. This wireless telephone is configured for mobile use in a car. The radiotelephone operator has a microphone and a speaker among other elements. This operating device is built into the sun visor of the vehicle. However, the use of radio telephones, in particular operating devices, is only possible when the sun visor is pulled down, and when the sun visor is raised the operating device with the operating elements can be used to drive a car driver, a speaker or a listener. Can't operate. Furthermore, in this case, the speaker and microphone are acoustically shielded from the driver by the sun visor.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to improve a mobile radio telephone of a motor vehicle and to provide a separate element for the mobile telephone sun visor so that the radio telephone can be used in all positions of the sun visor. Is to be incorporated into.

[0004]

According to the present invention, the speaker incorporated in the sun visor emits sound from the narrow side of the sun visor facing the speaker / listener,
The microphone is constructed and arranged to be located close to the narrow side of the sun visor opposite the speaker / listener.

The sun visor has two large flat surfaces and four
It has two small narrow sides. It is known from the prior art to incorporate a speaker or microphone of a radio telephone into a sun visor such that the main emission or reception direction is perpendicular to the two flat planes of the sun visor.

However, in such an arrangement, the speaker or microphone is shielded from the speaker / listener in the vehicle by the sun visor both in its raised and lowered positions. At such a sun visor position where the sun visor acoustically shields the speaker or microphone from the speaker / listener, the transmission quality obtained is not satisfactory. In the configuration of the present invention, one or more speakers are incorporated into the sun visor such that the speaker emits sound from the narrow side of the sun visor facing the speaker / listener. Flat piezoelectric speakers are particularly suitable for this. Thus, the speaker incorporated in the sun visor can emit sound without being disturbed by the interior of the automobile regardless of the position of the sun visor. Another advantage is that one or more microphones are located in close proximity to the opposite narrow side of the sun visor. This ensures that there is less feedback from the speaker to the microphone. This is particularly advantageous when the device is used in a hands-free device. The microphone can be provided on the opposite narrow side of the sun visor, on the indicator of the sun visor or optionally on a separate fixing device. The use of multiple microphones is advantageous because a wireless telephone with a noise suppressor can be provided. Using a larger number of microphones further enhances the effect of the noise suppressor.

In an embodiment of the invention, the microphone is mounted on a fixed member which is connected to the sun visor.

Since the microphone is usually placed close to the narrow side of the sun visor opposite the speaker / listener, it has a very small distance from the sun visor. In this case, the microphone directivity traverses the sun visor over a large area of rotation of the sun visor. The shielding effect of the sun visor by this obstructs sound reception by the microphone. In order to adapt the position of the microphone to the position of the sun visor, it is advantageous to provide the microphone on a fixing member connected to the sun visor. Therefore, the position of the microphone can be adjusted by turning the sun visor. In this way the shielding effect of the sun visor is reduced and the acoustic coupling between the microphone and the speaker / listener is improved.

In another embodiment of the invention, the fixing member is rotatably supported and, as a result of the coupling of the sun visor and the fixing member, a rotational movement is opposite to the direction of rotation of the sun visor.

The position of the sun visor can be roughly divided into three angular regions. That is, the position where the sun visor is facing upward, the position facing the speaker / listener, and the position facing downward. If the sun visor is pointing up, ie raised, the microphone must be downwardly directional to avoid acoustically shielding the speaker / listener sun visor from the microphone. . If the sun visor is in the downward angular position, the microphone directivity must be upward. In this case, the microphone directivity is above the angle of the microphone directivity when the sun visor is directly facing the speaker / listener. In order to be able to successfully adjust the microphone in a direction adapted to the position of the sun visor, it is advantageous to mount the fixed member on which the microphone is mounted for rotation. If the fixing member and the sun visor are combined so that the sun visor is rotated and the fixing member having the microphone is rotated in the opposite directions, the shielding by the sun visor of the microphone is the same as when the sun visor is pulled up. Only when it is pulled down, it is guaranteed to be slight.

In another embodiment of the invention, in the angular region in which the directivity of the microphone intersects with the sun visor, the fixing member is adapted to cross this angular region by snapping movement during pivoting of the sun visor. .

If the directivity of the sun visor and the microphone are both towards the speaker / listener, the directivity of the microphone lies in one plane with the sun visor. Since the microphone is usually placed close to the sun visor, such a position causes strong shielding from the speaker / listener by the sun visor of the microphone, which deteriorates the sound reception quality of the microphone. This disadvantageous position of the microphone is avoided by passing the microphone in this angular region by a snap movement. When the sun visor traverses upwards at an angle pointing to the speaker / listener, the fixing member with the microphone makes a snap movement so as to rotate into an angular region of low directivity of the microphone. Here, the snap movement of the fixing member refers to a movement in which the fixing member stops at predetermined upper and lower positions but does not stay in the middle position. When the sun visor traverses downwards at an angle pointing to the speaker / listener, the microphone, ie its directivity, is moved to a higher angular position. Proper upper and lower microphone positions are obtained when the microphone directivity does not just cross the sun visor.

The triggering of the snapping movement of the fixing element with the microphone is advantageously carried out during movement of the sun visor through the plane pointing the speaker / listener. In this way, the shielding effect of the sun visor in the central position of the sun visor is minimized. If the limit of the angular range at which the microphones intersect in the snap movement is chosen to be as small as the shielding of the microphone's sun visor as if the sun visor was fully raised or lowered, then The above technical means are sufficient to obtain a satisfactory acoustic coupling between the microphone and the speaker / listener in all swivel areas of the sun visor.

In another embodiment of the invention, the sun visor and the fixing element with the microphone are connected by a mechanical transmission.

The connection between the sun visor and the fixing element to which the microphone or microphones are fixed can in principle be achieved by electrical or mechanical means. The electrical realization means is, for example, a coupling using an electric motor. The electric motor is controlled by an electronic circuit, and in this configuration the electronic circuit controls the positions of the sun visor and the fixing member. Mechanical transmissions are advantageous because they are much easier to implement. The opposite movement of the sun visor and the fixing element can thus be realized very simply, for example by means of a transmission with two gears.

In another embodiment of the present invention, the fixing member is a rod.

As described above, in the present invention, the microphone is arranged close to the speaker / listener opposite side of the sun visor. The fixing member must support all microphones and also provide the microphone and sun visor coupling. The fixing member can simply be constituted by a rod. The microphone can be easily fixed to the rod, for example by means of a clamp or a screw connection.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The schematic diagram of FIG. 1 shows a radiotelephone with a transceiver 1 and three microphones 2, 3, 4 and a speaker 5. The microphone and speaker are located outside the transceiver casing. Such wireless telephones are designed for use in automobiles. The use of multiple microphones makes it possible to implement a noise suppression device known per se. The adverse effects of wind and engine noise can be reduced thereby. The transceiver 1 can be mounted, for example, between instrument panels or seats. An advantageous location for incorporating the microphones 2, 3, 4 and the speaker 5 is the sun visor. A good acoustic coupling between the microphone and the car driver, ie the speaker / listener, is thus obtained. Moreover, this site for integration is usually not occupied by other technical equipment.

FIG. 2 shows a sun visor device with a built-in speaker 5 and built-in microphones 2, 3, 4. The speaker 5 is incorporated in the sun visor 6 as follows. That is, the speaker is the sun visor 6.
The sound is emitted from the narrow side facing the speaker / listener. Here, a flat speaker, for example a piezoelectric speaker, is shown as an example of the speaker 5. The sun visor 6 is connected to the fixing member 8 via a transmission device 7. The fixing member supports the microphones 2, 3, 4 and is configured as a rod. The sun visor device is provided above the windshield inside the automobile.

The transmission device 7 connects the sun visor 6, that is, the speaker 5 and the microphones 2, 3, and 4. The rotating motion of the sun visor 6 is fixed by the transmission device to the fixing member 8
Can be converted into rotational movements of the microphones 2, 3, 4 arranged in the.

3 and 4 show two possible positions of the sun visor 6 and the microphones 2, 3, 4. Both figures are side views of the sun visor, microphone and speaker / listener head 11. Surface 10 is the microphone 2, 3,
4 shows the directivity direction. The plane of symmetry 9 is the microphone 2,
Crossing the three and four axes of rotation and the speaker / listener head 11;
The sun visor 6 having the built-in speaker 5 also turns around this rotation axis.

FIG. 3 shows the sun visor 6 in the raised position. The sun visor 6 is above the plane of symmetry 9. The directional direction 10 of the microphones 2, 3, 4 is below the plane of symmetry 9. Since the sun visor and the microphone are connected by the transmission device, when the sun visor 6 turns upward, the microphones 2, 3 and 4 rotate downward. This pivoting and rotating movement is shown in the drawing. Directional directions 10 of the microphones 2, 3, 4
Cannot cross the sun visor 6. Therefore, the microphones 2, 3, 4 are not substantially shielded from the speaker / listener by the sun visor 6. The sound emission of the speaker 5 is also shown. It is clear that the acoustic feedback to the microphones 2, 3, 4 has been reduced to a minimum. This is particularly advantageous when the radiotelephone is used as a hands-free device.

FIG. 4 shows the sun visor 6 in the lowered position. The sun visor 6 is below the plane of symmetry 9. With the sun visor 6 in this position, the directivity direction 10 of the microphones 2, 3, 4 is above the plane of symmetry 9. The downward swiveling of the sun visor 6 with the incorporated speaker 5 and the reverse rotation of the microphones 2, 3, 4 are shown at the same time. Microphone 2,
The directional directions 10 of 3 and 4 are the sun visor 6 in the illustrated example.
Do not cross Microphones 2, 3, 4 and speaker 5
Optimal acoustic coupling between speaker and listener is obtained.

The rotation of the microphones 2, 3, 4 shown in FIGS. 3 and 4 can be continuous or snap. The snap movement of the microphones 2, 3, 4 avoids the positions of the microphones 2, 3, 4 and the sun visor 6 being such that the directivity of the microphones is blocked by the sun visor 6. This position is especially when the sun visor 6 is aimed at the speaker / listener's head 11. The snap movement is advantageously triggered when the sun visor 6 passes the plane of symmetry 9. When the sun visor 6 passes the symmetry plane 9 downward,
The microphones 2, 3, 4 rotate in a snap motion so that the directivity direction 10 is shifted from the lower position of the symmetry plane 9 to the upper position of the symmetry plane 9. The swiveling of the sun visor 6 upwards from the lower position of the plane of symmetry 9 and the associated reverse rotation of the microphone are likewise effected. The snap movement of the microphones 2, 3, 4 is also triggered when the sun visor 6 passes the plane of symmetry 9.

FIG. 5 shows the coupling means of the sun visor 6 and the fixing member 8 by the part of the associated sun visor device.
The bearing 12 is fixedly connected to, for example, an automobile body 13. Both the fixed rod 14 of the sun visor 6 and the fixed rod 15 of the fixed member 8 are rotatably supported by the bearing 12. The fixing rods 14 and 15 are the sun visor 6.
And the fixing member 8 are fixedly connected to each other. An elastic coupling element 16, for example a rubber band, a rubber tape or a tension spring or leaf spring, is attached to the fixing member 8 and the sun visor 6 in a biased manner. When the sun visor 6 pivots downwards from the upper position in FIG.
When traversing the extension line of the rotation axis of 2, the fixing member 8 performs a snap rotation movement in the downward direction. Therefore, the direction of the torsional moment generated by the coupling element 16 and the direction of action on the fixing member are reversed. Therefore the microphone 2,
The 3 and 4 directional directions switch from bottom to top as desired. The connection on the opposite side of the sun visor 6 and the fixing member 8 is also configured in the same manner.

[0027]

According to the present invention, the wireless telephone can be used at all positions of the sun visor.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a wireless telephone having a speaker and three microphones.

FIG. 2 is a schematic diagram of a sun visor device having an incorporated speaker and an incorporated microphone.

FIG. 3 is a schematic view showing positions of a sun visor and a microphone.

FIG. 4 is a schematic view showing positions of a sun visor and a microphone.

FIG. 5 is a schematic view showing a fixing member having a sun visor and a microphone and a coupling means.

[Explanation of symbols]

 1 Transceiver 2, 3, 4 Microphone 5 Speaker 6 Sun visor 7 Transmission device 8 Fixing member 9 Symmetrical plane 10 Directional direction of microphone 12 Bearing 13 Automotive body 14, 15 Fixing rod 16 Coupling element

Claims (6)

[Claims] 1. A radio telephone having at least one speaker (5) and at least one microphone (2, 3, 4) incorporated in a sun visor device, wherein the speaker (5) incorporated in the sun visor is a sun visor. Sound is emitted from the narrow side facing the speaker / listener of (6), and the microphone (2, 3, 4) is the narrow side opposite to the speaker / listener of the sun visor (6). A wireless telephone characterized by being placed in close proximity to. 2. A radio telephone according to claim 1, wherein the microphones (2, 3, 4) are provided on a fixing member (8) connected to the sun visor (6). 3. The fixing member (8) is rotatably supported, and the connection of the sun visor (6) and the fixing member (8) causes the sun visor (6) to rotate in a direction opposite to the turning direction. The wireless telephone according to claim 2, which exercises. 4. The fixing member is a microphone (2, 3,
4. The radio telephone according to claim 2, wherein the directivity of 4) intersects the sun visor (6) in a snap movement during the turning of the sun visor (6). 5. The sun visor (6) and the fixing member (8) supporting the microphones (2, 3, 4) are connected by a mechanical transmission (7). The wireless telephone according to item 1. 6. The fixing member (8) is a rod.
The wireless telephone according to any one of 1 to 5.